Table 1.

PGLS model of relationships between lifespan/mean age and group-spawning for 38 species of anurans.

Predictors	Longevity				Mean age
	λ	β	t	P	λ	β	t	P
Spawning-site density	<0.0011,<0.001	0.308	4.385	<0.001	<0.0011,0.002	0.213	2.551	0.016
SVL		0.040	0.498	0.622		0.201	2.100	0.044
Altitude		−0.008	−0.235	0.816		0.070	1.711	0.097
Latitude		1.076	2.587	0.014		1.218	2.453	0.020
Age at sexual maturity		0.350	4.265	<0.001		0.284	2.879	0.007
Spawning-site group size	<0.0011,<0.001	0.167	2.827	0.008	<0.0011,0.012	0.115	1.795	0.082
SVL		0.053	0.580	0.566		0.209	2.089	0.045
Altitude		−0.011	−0.290	0.774		0.071	1.658	0.107
Latitude		1.130	2.401	0.022		1.266	2.448	0.020
Age at sexual maturity		0.424	4.790	<0.001		0.337	3.445	0.002

Significant predictors are marked in bold. Phylogenetic scaling parameters (superscripts following λ denote P-values of likelihood ratio tests against models with λ = 0 and λ = 1, respectively).